I love The Virgin Spring. (Silence is my favourite Bergman film, but this one isn't far behind. Precisely because

Suddenly the annoyance felt at Karin’s stupidity feels very hard to swallow, because no matter how naïve she was – she did in no way deserve this.

I'll have to watch it again. The scene I remember the most is the one where the killers try to sell "their sister's" clothes (at least that was the translation when I saw it first) to the parents. I can't remember if they at any point realise whose house they're in.